![alexisbaronetp85kek](/avatars/34844.jpg)
alexisbaronetp85kek
12.12.2020 •
Mathematics
What is z? -0.25z = -1.25
Solved
Show answers
More tips
- W Work and Career Where can you learn to be a flight attendant?...
- G Goods and services How to Properly Calculate the Power of Your Air Conditioner?...
- F Food and Cooking Effective Methods to Organize Videos in your iPad According to Content...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
Answers on questions: Mathematics
- M Mathematics To divide using a model, which of the following are true? Select all that are correct....
- M Mathematics What is the cost of 10.2 gallons of gas at $2.249 per gallon?...
- C Chemistry You plan to prepare 4 solutions by serial dilution. The concentration of your stock solution is 2.7 M and the dilution factor is 3. What will be the molarity of your four solutions...
- M Mathematics State whether each of the following statements is true or false. If false, then explain what would make the statement true (a) The central limit theorem explains why the mean is...
- E English Six word summery for chapter 9 from the book night please help...
- H History Why two or more other physical features of India were unsuitable for settlement?...
- E English What is the balanced chemical equation for photosynthesis, and how is the process described in words?...
Ответ:
z = 5
Step-by-step explanation:
-0.25z = -1.25
-1.25 ÷ -0.25 = 5
z = 5
Ответ:
Step-by-step explanation:
Given sin 30° = 1/2, to check which of the statements is correct we will apply the Pythagoras theorem to a right angled triangle shown in the attachment.
using the SOH CAH TOA trig identity on the right angled triangle, ACD gotten from the equilateral triangle ABC;
From ΔACD, AD is the hypotenuse, DC is the opposite side to the angle 30° and AC is the adjacent.
From the diagram, sin30° = opp/hyp = DC/AD
sin30° = 1/2
Taking consideration of the acute angle 60°, the opposite side to the angle will be AC and the adjacent side will be CD.
According to CAH, cos 60° = adj/hyp = CD/AD
Given CD = 1 and AD = 2
cos60° = 1/2
This shows that sin30° = cos60° = 1/2
Note that ∠CDA and ∠DAC are angles complementary. Complementary angles are angles which have its sum to be 90°